6 files changed, 71 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h
index 02a12b69555f..4dab6fc265a2 100644
--- a/drivers/net/ethernet/intel/e1000e/defines.h
+++ b/drivers/net/ethernet/intel/e1000e/defines.h
@@ -232,6 +232,7 @@
 #define E1000_CTRL_FRCDPX   0x00001000  /* Force Duplex */
 #define E1000_CTRL_LANPHYPC_OVERRIDE 0x00010000 /* SW control of LANPHYPC */
 #define E1000_CTRL_LANPHYPC_VALUE    0x00020000 /* SW value of LANPHYPC */
+#define E1000_CTRL_MEHE     0x00080000  /* Memory Error Handling Enable */
 #define E1000_CTRL_SWDPIN0  0x00040000  /* SWDPIN 0 value */
 #define E1000_CTRL_SWDPIN1  0x00080000  /* SWDPIN 1 value */
 #define E1000_CTRL_SWDPIO0  0x00400000  /* SWDPIN 0 Input or output */
@@ -389,6 +390,12 @@
 
 #define E1000_PBS_16K E1000_PBA_16K
 
+/* Uncorrectable/correctable ECC Error counts and enable bits */
+#define E1000_PBECCSTS_CORR_ERR_CNT_MASK        0x000000FF
+#define E1000_PBECCSTS_UNCORR_ERR_CNT_MASK      0x0000FF00
+#define E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT     8
+#define E1000_PBECCSTS_ECC_ENABLE               0x00010000
+
 #define IFS_MAX       80
 #define IFS_MIN       40
 #define IFS_RATIO     4
@@ -408,6 +415,7 @@
 #define E1000_ICR_RXSEQ         0x00000008 /* Rx sequence error */
 #define E1000_ICR_RXDMT0        0x00000010 /* Rx desc min. threshold (0) */
 #define E1000_ICR_RXT0          0x00000080 /* Rx timer intr (ring 0) */
+#define E1000_ICR_ECCER         0x00400000 /* Uncorrectable ECC Error */
 #define E1000_ICR_INT_ASSERTED  0x80000000 /* If this bit asserted, the driver should claim the interrupt */
 #define E1000_ICR_RXQ0          0x00100000 /* Rx Queue 0 Interrupt */
 #define E1000_ICR_RXQ1          0x00200000 /* Rx Queue 1 Interrupt */
@@ -443,6 +451,7 @@
 #define E1000_IMS_RXSEQ     E1000_ICR_RXSEQ     /* Rx sequence error */
 #define E1000_IMS_RXDMT0    E1000_ICR_RXDMT0    /* Rx desc min. threshold */
 #define E1000_IMS_RXT0      E1000_ICR_RXT0      /* Rx timer intr */
+#define E1000_IMS_ECCER     E1000_ICR_ECCER     /* Uncorrectable ECC Error */
 #define E1000_IMS_RXQ0      E1000_ICR_RXQ0      /* Rx Queue 0 Interrupt */
 #define E1000_IMS_RXQ1      E1000_ICR_RXQ1      /* Rx Queue 1 Interrupt */
 #define E1000_IMS_TXQ0      E1000_ICR_TXQ0      /* Tx Queue 0 Interrupt */
diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index 6782a2eea1bc..7e95f221d60b 100644
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -309,6 +309,8 @@ struct e1000_adapter {
 
         struct napi_struct napi;
 
+        unsigned int uncorr_errors;     /* uncorrectable ECC errors */
+        unsigned int corr_errors;       /* correctable ECC errors */
         unsigned int restart_queue;
         u32 txd_cmd;
 
diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index f95bc6ee1c22..fd4772a2691c 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -108,6 +108,8 @@ static const struct e1000_stats e1000_gstrings_stats[] = {
         E1000_STAT("dropped_smbus", stats.mgpdc),
         E1000_STAT("rx_dma_failed", rx_dma_failed),
         E1000_STAT("tx_dma_failed", tx_dma_failed),
+        E1000_STAT("uncorr_ecc_errors", uncorr_errors),
+        E1000_STAT("corr_ecc_errors", corr_errors),
 };
 
 #define E1000_GLOBAL_STATS_LEN  ARRAY_SIZE(e1000_gstrings_stats)
diff --git a/drivers/net/ethernet/intel/e1000e/hw.h b/drivers/net/ethernet/intel/e1000e/hw.h
index cf217777586c..b88676ff3d86 100644
--- a/drivers/net/ethernet/intel/e1000e/hw.h
+++ b/drivers/net/ethernet/intel/e1000e/hw.h
@@ -77,6 +77,7 @@ enum e1e_registers {
 #define E1000_POEMB     E1000_PHY_CTRL  /* PHY OEM Bits */
         E1000_PBA      = 0x01000, /* Packet Buffer Allocation - RW */
         E1000_PBS      = 0x01008, /* Packet Buffer Size */
+        E1000_PBECCSTS = 0x0100C, /* Packet Buffer ECC Status - RW */
         E1000_EEMNGCTL = 0x01010, /* MNG EEprom Control */
         E1000_EEWR     = 0x0102C, /* EEPROM Write Register - RW */
         E1000_FLOP     = 0x0103C, /* FLASH Opcode Register */
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 976336547607..24d9f61956f0 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -3624,6 +3624,17 @@ static void e1000_initialize_hw_bits_ich8lan(struct e1000_hw *hw)
         if (hw->mac.type == e1000_ich8lan)
                 reg |= (E1000_RFCTL_IPV6_EX_DIS | E1000_RFCTL_NEW_IPV6_EXT_DIS);
         ew32(RFCTL, reg);
+
+        /* Enable ECC on Lynxpoint */
+        if (hw->mac.type == e1000_pch_lpt) {
+                reg = er32(PBECCSTS);
+                reg |= E1000_PBECCSTS_ECC_ENABLE;
+                ew32(PBECCSTS, reg);
+
+                reg = er32(CTRL);
+                reg |= E1000_CTRL_MEHE;
+                ew32(CTRL, reg);
+        }
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index fbf75fdca994..643c883dd795 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -1678,6 +1678,23 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
         }
 
+        /* Reset on uncorrectable ECC error */
+        if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
+                u32 pbeccsts = er32(PBECCSTS);
+
+                adapter->corr_errors +=
+                    pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
+                adapter->uncorr_errors +=
+                    (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
+                    E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
+
+                /* Do the reset outside of interrupt context */
+                schedule_work(&adapter->reset_task);
+
+                /* return immediately since reset is imminent */
+                return IRQ_HANDLED;
+        }
+
         if (napi_schedule_prep(&adapter->napi)) {
                 adapter->total_tx_bytes = 0;
                 adapter->total_tx_packets = 0;
@@ -1741,6 +1758,23 @@ static irqreturn_t e1000_intr(int irq, void *data)
                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
         }
 
+        /* Reset on uncorrectable ECC error */
+        if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
+                u32 pbeccsts = er32(PBECCSTS);
+
+                adapter->corr_errors +=
+                    pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
+                adapter->uncorr_errors +=
+                    (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
+                    E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
+
+                /* Do the reset outside of interrupt context */
+                schedule_work(&adapter->reset_task);
+
+                /* return immediately since reset is imminent */
+                return IRQ_HANDLED;
+        }
+
         if (napi_schedule_prep(&adapter->napi)) {
                 adapter->total_tx_bytes = 0;
                 adapter->total_tx_packets = 0;
@@ -2104,6 +2138,8 @@ static void e1000_irq_enable(struct e1000_adapter *adapter)
         if (adapter->msix_entries) {
                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
+        } else if (hw->mac.type == e1000_pch_lpt) {
+                ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
         } else {
                 ew32(IMS, IMS_ENABLE_MASK);
         }
@@ -4251,6 +4287,16 @@ static void e1000e_update_stats(struct e1000_adapter *adapter)
         adapter->stats.mgptc += er32(MGTPTC);
         adapter->stats.mgprc += er32(MGTPRC);
         adapter->stats.mgpdc += er32(MGTPDC);
+
+        /* Correctable ECC Errors */
+        if (hw->mac.type == e1000_pch_lpt) {
+                u32 pbeccsts = er32(PBECCSTS);
+                adapter->corr_errors +=
+                    pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
+                adapter->uncorr_errors +=
+                    (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
+                    E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
+        }
 }
 
 /**